diff --git a/.tool-versions b/.tool-versions
index 59870d18f..689a5b581 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,17 +1,15 @@
 act 0.2.64
 gitleaks 8.24.0
 jq 1.6
-nodejs 22.22.0
+nodejs 22.16.0
 pre-commit 3.6.0
 terraform 1.10.1
 terraform-docs 0.19.0
 trivy 0.61.0
 vale 3.6.0
 python 3.13.2
-
 # ==============================================================================
 # The section below is reserved for Docker image versions.
-
 # TODO: Move this section - consider using a different file for the repository template dependencies.
 # docker/ghcr.io/anchore/grype v0.104.3@sha256:d340f4f8b3b7e6e72a6c9c0152f25402ed8a2d7375dba1dfce4e53115242feb6  # SEE: https://github.com/anchore/grype/pkgs/container/grype
 # docker/ghcr.io/anchore/syft v1.39.0@sha256:6f13bb010923c33fb197047c8f88888e77071bd32596b3f605d62a133e493ce4 # SEE: https://github.com/anchore/syft/pkgs/container/syft
diff --git a/frontend/src/__tests__/app/choose-a-template-type/__snapshots__/page.test.tsx.snap b/frontend/src/__tests__/app/choose-a-template-type/__snapshots__/page.test.tsx.snap
deleted file mode 100644
index 11086d6c4..000000000
--- a/frontend/src/__tests__/app/choose-a-template-type/__snapshots__/page.test.tsx.snap
+++ /dev/null
@@ -1,163 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`ChooseATemplateTypePage 1`] = `
-<DocumentFragment>
-  <a
-    class="nhsuk-back-link"
-    data-testid="back-link-top"
-    href="/message-templates"
-  >
-    Back to all templates
-  </a>
-  <main
-    class="nhsuk-main-wrapper"
-    id="maincontent"
-    role="main"
-  >
-    <form
-      action="/action"
-    >
-      <input
-        name="form-id"
-        readonly=""
-        type="hidden"
-        value="choose-a-template-type"
-      />
-      <input
-        name="csrf_token"
-        readonly=""
-        type="hidden"
-        value="no_token"
-      />
-      <div
-        class="nhsuk-form-group"
-      >
-        <fieldset
-          class="nhsuk-fieldset"
-        >
-          <legend
-            class="nhsuk-fieldset__legend nhsuk-fieldset__legend--l"
-            data-testid="templateType-form__legend"
-          >
-            <h1
-              class="nhsuk-fieldset__heading"
-            >
-              Choose a template type to create
-            </h1>
-          </legend>
-          <p>
-            <a
-              href="/features"
-              rel="noopener noreferrer"
-              target="_blank"
-            >
-              Learn more about message channels (opens in a new tab)
-            </a>
-          </p>
-          <div
-            class="nhsuk-form-group"
-          >
-            <div
-              class="nhsuk-hint"
-              id="templateType--hint"
-            >
-              Select one option
-            </div>
-            <div
-              aria-describedby="templateType--hint"
-              class="nhsuk-radios"
-              id="templateType"
-            >
-              <div
-                class="nhsuk-radios__item"
-              >
-                <input
-                  class="nhsuk-radios__input"
-                  data-testid="nhsapp-radio"
-                  id="templateType-nhsapp"
-                  name="templateType"
-                  type="radio"
-                  value="NHS_APP"
-                />
-                <label
-                  class="nhsuk-label nhsuk-radios__label"
-                  for="templateType-nhsapp"
-                  id="templateType-nhsapp--label"
-                >
-                  NHS App message
-                </label>
-              </div>
-              <div
-                class="nhsuk-radios__item"
-              >
-                <input
-                  class="nhsuk-radios__input"
-                  data-testid="email-radio"
-                  id="templateType-email"
-                  name="templateType"
-                  type="radio"
-                  value="EMAIL"
-                />
-                <label
-                  class="nhsuk-label nhsuk-radios__label"
-                  for="templateType-email"
-                  id="templateType-email--label"
-                >
-                  Email
-                </label>
-              </div>
-              <div
-                class="nhsuk-radios__item"
-              >
-                <input
-                  class="nhsuk-radios__input"
-                  data-testid="sms-radio"
-                  id="templateType-sms"
-                  name="templateType"
-                  type="radio"
-                  value="SMS"
-                />
-                <label
-                  class="nhsuk-label nhsuk-radios__label"
-                  for="templateType-sms"
-                  id="templateType-sms--label"
-                >
-                  Text message (SMS)
-                </label>
-              </div>
-              <div
-                class="nhsuk-radios__item"
-              >
-                <input
-                  class="nhsuk-radios__input"
-                  data-testid="letter-radio"
-                  id="templateType-letter"
-                  name="templateType"
-                  type="radio"
-                  value="LETTER"
-                />
-                <label
-                  class="nhsuk-label nhsuk-radios__label"
-                  for="templateType-letter"
-                  id="templateType-letter--label"
-                >
-                  Letter
-                </label>
-              </div>
-            </div>
-          </div>
-        </fieldset>
-      </div>
-      <button
-        aria-disabled="false"
-        class="nhsuk-button"
-        data-testid="submit-button"
-        id="choose-a-template-type-submit-button"
-        type="submit"
-      >
-        Continue
-      </button>
-    </form>
-  </main>
-</DocumentFragment>
-`;
diff --git a/frontend/src/__tests__/app/choose-a-template-type/page.test.tsx b/frontend/src/__tests__/app/choose-a-template-type/page.test.tsx
index 3131e04e5..98c862849 100644
--- a/frontend/src/__tests__/app/choose-a-template-type/page.test.tsx
+++ b/frontend/src/__tests__/app/choose-a-template-type/page.test.tsx
@@ -4,9 +4,12 @@ import ChooseATemplateTypePage, {
 } from '@app/choose-a-template-type/page';
 import { TemplateFormState } from 'nhs-notify-web-template-management-utils';
 import content from '@content/content';
+import { useFeatureFlags } from '@providers/client-config-provider';
 
 const { pageTitle } = content.components.chooseTemplateType;
 
+jest.mocked(useFeatureFlags).mockReturnValue({ letterAuthoring: true });
+
 jest.mock('next/navigation', () => ({
   redirect: () => {
     throw new Error('Simulated redirect');
diff --git a/frontend/src/__tests__/app/message-plans/choose-message-order/__snapshots__/page.test.tsx.snap b/frontend/src/__tests__/app/message-plans/choose-message-order/__snapshots__/page.test.tsx.snap
index 26f886e7b..74acf350d 100644
--- a/frontend/src/__tests__/app/message-plans/choose-message-order/__snapshots__/page.test.tsx.snap
+++ b/frontend/src/__tests__/app/message-plans/choose-message-order/__snapshots__/page.test.tsx.snap
@@ -208,6 +208,36 @@ exports[`ChooseMessageOrderPage 1`] = `
           </div>
         </fieldset>
       </div>
+      <div
+        class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+      >
+        <div
+          class="nhsuk-card__content"
+        >
+          <h4
+            class="nhsuk-card__heading"
+          >
+            To create a letter template
+          </h4>
+          <p
+            class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+          >
+            You cannot upload a letter template using this service.
+          </p>
+          <p
+            class="nhsuk-card__description"
+          >
+            Follow our guidance to 
+            <a
+              href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+              rel="noopener noreferrer"
+              target="_blank"
+            >
+              upload a letter template (opens in a new tab)
+            </a>
+          </p>
+        </div>
+      </div>
       <button
         aria-disabled="false"
         class="nhsuk-button"
diff --git a/frontend/src/__tests__/components/forms/ChooseMessageOrder/ChooseMessageOrder.test.tsx b/frontend/src/__tests__/components/forms/ChooseMessageOrder/ChooseMessageOrder.test.tsx
index 253fb84b9..5f79eaabe 100644
--- a/frontend/src/__tests__/components/forms/ChooseMessageOrder/ChooseMessageOrder.test.tsx
+++ b/frontend/src/__tests__/components/forms/ChooseMessageOrder/ChooseMessageOrder.test.tsx
@@ -2,6 +2,7 @@ import { useActionState } from 'react';
 import { render, screen, fireEvent } from '@testing-library/react';
 import { ChooseMessageOrder } from '@forms/ChooseMessageOrder/ChooseMessageOrder';
 import { TemplateFormState } from 'nhs-notify-web-template-management-utils';
+import { useFeatureFlags } from '@providers/client-config-provider';
 
 jest.mock('@utils/amplify-utils');
 
@@ -24,6 +25,8 @@ jest.mock('react', () => {
   };
 });
 
+jest.mocked(useFeatureFlags).mockReturnValue({ letterAuthoring: true });
+
 describe('Choose message order page', () => {
   const errorLogger = console.error;
 
diff --git a/frontend/src/__tests__/components/forms/PreviewEmailTemplate/PreviewEmailTemplate.test.tsx b/frontend/src/__tests__/components/forms/PreviewEmailTemplate/PreviewEmailTemplate.test.tsx
index a0f5984b7..50b675c29 100644
--- a/frontend/src/__tests__/components/forms/PreviewEmailTemplate/PreviewEmailTemplate.test.tsx
+++ b/frontend/src/__tests__/components/forms/PreviewEmailTemplate/PreviewEmailTemplate.test.tsx
@@ -43,7 +43,9 @@ beforeEach(() => {
 describe('Preview email form renders', () => {
   describe('Routing feature flag - Disabled', () => {
     beforeEach(() => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing: false });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing: false, letterAuthoring: true });
     });
 
     it('matches error snapshot', () => {
@@ -114,7 +116,9 @@ describe('Preview email form renders', () => {
 
   describe('Routing feature flag - Enabled', () => {
     beforeEach(() => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing: true });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing: true, letterAuthoring: true });
     });
 
     it('renders component correctly', () => {
@@ -141,7 +145,9 @@ describe('Preview email form renders', () => {
   it.each([true, false])(
     'matches snapshot when navigating from manage templates screen, when routing is %p',
     (routing) => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing, letterAuthoring: true });
 
       const container = render(
         <PreviewEmailTemplate
@@ -163,7 +169,9 @@ describe('Preview email form renders', () => {
   it.each([true, false])(
     'matches snapshot when navigating from edit screen when routing is %p',
     (routing) => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing, letterAuthoring: true });
 
       const mockSearchParams = new Map([['from', 'edit']]);
       (useSearchParams as jest.Mock).mockImplementationOnce(() => ({
diff --git a/frontend/src/__tests__/components/forms/PreviewNHSAppTemplate/PreviewNHSAppTemplate.test.tsx b/frontend/src/__tests__/components/forms/PreviewNHSAppTemplate/PreviewNHSAppTemplate.test.tsx
index 81e0cb099..cab8e2571 100644
--- a/frontend/src/__tests__/components/forms/PreviewNHSAppTemplate/PreviewNHSAppTemplate.test.tsx
+++ b/frontend/src/__tests__/components/forms/PreviewNHSAppTemplate/PreviewNHSAppTemplate.test.tsx
@@ -43,7 +43,9 @@ beforeEach(() => {
 describe('Preview nhs app form renders', () => {
   describe('Routing feature flag - Disabled', () => {
     beforeEach(() => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing: false });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing: false, letterAuthoring: true });
     });
 
     it('matches error snapshot', () => {
@@ -110,7 +112,9 @@ describe('Preview nhs app form renders', () => {
 
   describe('Routing feature flag - Enabled', () => {
     beforeEach(() => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing: true });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing: true, letterAuthoring: true });
     });
 
     it('renders component correctly', () => {
@@ -136,7 +140,9 @@ describe('Preview nhs app form renders', () => {
   it.each([true, false])(
     'matches snapshot when navigating from manage templates screen when routing is %p',
     (routing) => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing, letterAuthoring: true });
 
       const container = render(
         <PreviewNHSAppTemplate
@@ -157,7 +163,9 @@ describe('Preview nhs app form renders', () => {
   it.each([true, false])(
     'matches snapshot when navigating from edit screen when routing is %p',
     (routing) => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing, letterAuthoring: true });
 
       const mockSearchParams = new Map([['from', 'edit']]);
       (useSearchParams as jest.Mock).mockImplementationOnce(() => ({
diff --git a/frontend/src/__tests__/components/forms/PreviewSMSTemplate/PreviewSMSTemplate.test.tsx b/frontend/src/__tests__/components/forms/PreviewSMSTemplate/PreviewSMSTemplate.test.tsx
index b738769d5..3c057f714 100644
--- a/frontend/src/__tests__/components/forms/PreviewSMSTemplate/PreviewSMSTemplate.test.tsx
+++ b/frontend/src/__tests__/components/forms/PreviewSMSTemplate/PreviewSMSTemplate.test.tsx
@@ -43,7 +43,9 @@ beforeEach(() => {
 describe('Review sms form renders', () => {
   describe('Routing feature flag - Disabled', () => {
     beforeEach(() => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing: false });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing: false, letterAuthoring: true });
     });
 
     it('matches error snapshot', () => {
@@ -110,7 +112,9 @@ describe('Review sms form renders', () => {
 
   describe('Routing feature flag - Enabled', () => {
     beforeEach(() => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing: true });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing: true, letterAuthoring: true });
     });
 
     it('renders component correctly', () => {
@@ -136,7 +140,9 @@ describe('Review sms form renders', () => {
   it.each([true, false])(
     'matches snapshot when navigating from manage templates screen when routing is %p',
     (routing) => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing, letterAuthoring: true });
 
       const container = render(
         <PreviewSMSTemplate
@@ -157,7 +163,9 @@ describe('Review sms form renders', () => {
   it.each([true, false])(
     'matches snapshot when navigating from edit screen when routing is %p',
     (routing) => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing, letterAuthoring: true });
 
       const mockSearchParams = new Map([['from', 'edit']]);
       (useSearchParams as jest.Mock).mockImplementationOnce(() => ({
diff --git a/frontend/src/__tests__/components/molecules/__snapshots__/NHSNotifyRadioButtonForm.test.tsx.snap b/frontend/src/__tests__/components/molecules/__snapshots__/NHSNotifyRadioButtonForm.test.tsx.snap
index 282815eb2..095f6e642 100644
--- a/frontend/src/__tests__/components/molecules/__snapshots__/NHSNotifyRadioButtonForm.test.tsx.snap
+++ b/frontend/src/__tests__/components/molecules/__snapshots__/NHSNotifyRadioButtonForm.test.tsx.snap
@@ -82,6 +82,36 @@ exports[`Renders NHSNotifyRadioButtonForm - handles validation errors for other
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -177,6 +207,36 @@ exports[`Renders NHSNotifyRadioButtonForm - renders without validation error fie
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -284,6 +344,36 @@ exports[`Renders NHSNotifyRadioButtonForm correctly with errors 1`] = `
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -386,6 +476,36 @@ exports[`Renders NHSNotifyRadioButtonForm correctly without errors 1`] = `
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -494,6 +614,36 @@ exports[`Renders NHSNotifyRadioButtonForm with conditional content for a radio o
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -653,6 +803,36 @@ exports[`Renders NHSNotifyRadioButtonForm with conditional radios and validation
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -764,6 +944,36 @@ exports[`Renders NHSNotifyRadioButtonForm with learn more link 1`] = `
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -911,6 +1121,36 @@ exports[`Renders NHSNotifyRadioButtonForm with nested conditional radio buttons
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -1013,6 +1253,36 @@ exports[`Renders NHSNotifyRadioButtonForm without learn more link if learnMoreLi
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
@@ -1115,6 +1385,36 @@ exports[`Renders NHSNotifyRadioButtonForm without learn more link if learnMoreTe
         </div>
       </fieldset>
     </div>
+    <div
+      class="nhsuk-card nhsuk-card--warning nhsuk-u-reading-width"
+    >
+      <div
+        class="nhsuk-card__content"
+      >
+        <h4
+          class="nhsuk-card__heading"
+        >
+          To create a letter template
+        </h4>
+        <p
+          class="nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6"
+        >
+          You cannot upload a letter template using this service.
+        </p>
+        <p
+          class="nhsuk-card__description"
+        >
+          Follow our guidance to 
+          <a
+            href="https://notify.nhs.uk/using-nhs-notify/upload-a-letter"
+            rel="noopener noreferrer"
+            target="_blank"
+          >
+            upload a letter template (opens in a new tab)
+          </a>
+        </p>
+      </div>
+    </div>
     <button
       aria-disabled="false"
       class="nhsuk-button"
diff --git a/frontend/src/__tests__/components/organisms/PreviewDigitalTemplate.test.tsx b/frontend/src/__tests__/components/organisms/PreviewDigitalTemplate.test.tsx
index f7130b5ff..853f48b8e 100644
--- a/frontend/src/__tests__/components/organisms/PreviewDigitalTemplate.test.tsx
+++ b/frontend/src/__tests__/components/organisms/PreviewDigitalTemplate.test.tsx
@@ -15,9 +15,11 @@ beforeEach(() => {
 });
 
 describe('PreviewDigitalTemplate', () => {
-  describe('Routing disabled', () => {
+  describe('Routing disabled with letter authoring enabled', () => {
     beforeEach(() => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing: false });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing: false, letterAuthoring: true });
     });
 
     it('matches snapshot', () => {
@@ -117,9 +119,11 @@ describe('PreviewDigitalTemplate', () => {
     });
   });
 
-  describe('Routing enabled', () => {
+  describe('Routing enabled with letter authoring enabled', () => {
     beforeEach(() => {
-      jest.mocked(useFeatureFlags).mockReturnValue({ routing: true });
+      jest
+        .mocked(useFeatureFlags)
+        .mockReturnValue({ routing: true, letterAuthoring: true });
     });
 
     it('matches snapshot', () => {
diff --git a/frontend/src/__tests__/components/organisms/__snapshots__/PreviewDigitalTemplate.test.tsx.snap b/frontend/src/__tests__/components/organisms/__snapshots__/PreviewDigitalTemplate.test.tsx.snap
index 408d52ecf..b53e74502 100644
--- a/frontend/src/__tests__/components/organisms/__snapshots__/PreviewDigitalTemplate.test.tsx.snap
+++ b/frontend/src/__tests__/components/organisms/__snapshots__/PreviewDigitalTemplate.test.tsx.snap
@@ -1,6 +1,6 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`PreviewDigitalTemplate Routing disabled matches error snapshot 1`] = `
+exports[`PreviewDigitalTemplate Routing disabled with letter authoring enabled matches error snapshot 1`] = `
 <DocumentFragment>
   <div
     class="notify-confirmation-panel nhsuk-heading-l"
@@ -122,7 +122,7 @@ exports[`PreviewDigitalTemplate Routing disabled matches error snapshot 1`] = `
 </DocumentFragment>
 `;
 
-exports[`PreviewDigitalTemplate Routing disabled matches snapshot 1`] = `
+exports[`PreviewDigitalTemplate Routing disabled with letter authoring enabled matches snapshot 1`] = `
 <DocumentFragment>
   <div
     class="notify-confirmation-panel nhsuk-heading-l"
@@ -219,7 +219,7 @@ exports[`PreviewDigitalTemplate Routing disabled matches snapshot 1`] = `
 </DocumentFragment>
 `;
 
-exports[`PreviewDigitalTemplate Routing enabled matches snapshot 1`] = `
+exports[`PreviewDigitalTemplate Routing enabled with letter authoring enabled matches snapshot 1`] = `
 <DocumentFragment>
   Preview
   <a
diff --git a/frontend/src/components/forms/ChooseTemplateType/ChooseTemplateType.tsx b/frontend/src/components/forms/ChooseTemplateType/ChooseTemplateType.tsx
index 81a30322d..11e3fb1b4 100644
--- a/frontend/src/components/forms/ChooseTemplateType/ChooseTemplateType.tsx
+++ b/frontend/src/components/forms/ChooseTemplateType/ChooseTemplateType.tsx
@@ -33,6 +33,10 @@ export const ChooseTemplateType = ({
 
   const features = useFeatureFlags();
 
+  const filteredTemplateTypes = features.letterAuthoring
+    ? templateTypes
+    : templateTypes.filter((type) => type !== 'LETTER');
+
   const $ChooseTemplateType = features.letterAuthoring
     ? $ChooseTemplateTypeWithLetterAuthoring
     : $ChooseTemplateTypeBase;
@@ -61,7 +65,7 @@ export const ChooseTemplateType = ({
     </Radios>
   );
 
-  const templateTypeOptions = templateTypes.map((templateType) => ({
+  const templateTypeOptions = filteredTemplateTypes.map((templateType) => ({
     id: templateType,
     text: content.templateTypes[templateType],
     conditional:
@@ -93,6 +97,7 @@ export const ChooseTemplateType = ({
           learnMoreLink={content.learnMoreLink}
           learnMoreText={content.learnMoreText}
           formAttributes={{ onSubmit: formValidate }}
+          isLetterAuthoringEnabled={features.letterAuthoring}
         />
       </NHSNotifyMain>
     </>
diff --git a/frontend/src/components/molecules/NHSNotifyRadioButtonForm/NHSNotifyRadioButtonForm.tsx b/frontend/src/components/molecules/NHSNotifyRadioButtonForm/NHSNotifyRadioButtonForm.tsx
index c01bc244b..93d10126a 100644
--- a/frontend/src/components/molecules/NHSNotifyRadioButtonForm/NHSNotifyRadioButtonForm.tsx
+++ b/frontend/src/components/molecules/NHSNotifyRadioButtonForm/NHSNotifyRadioButtonForm.tsx
@@ -2,6 +2,7 @@ import { Radios, Fieldset } from 'nhsuk-react-components';
 import { FormState } from 'nhs-notify-web-template-management-utils';
 import { NHSNotifyFormWrapper } from '@molecules/NHSNotifyFormWrapper/NHSNotifyFormWrapper';
 import { NHSNotifyButton } from '@atoms/NHSNotifyButton/NHSNotifyButton';
+import content from '@content/content';
 import { DetailedHTMLProps, FormHTMLAttributes, ReactNode } from 'react';
 import Link from 'next/link';
 
@@ -33,8 +34,11 @@ export type NHSNotifyRadioButtonFormProps = {
     text: string;
     url: string;
   };
+  isLetterAuthoringEnabled?: boolean;
 };
 
+const { warningCalloutContent } = content.components.chooseTemplateType;
+
 const normaliseId = (id: string) =>
   id.toLowerCase().replaceAll('_', '').replaceAll(',', '-');
 
@@ -52,6 +56,7 @@ export const NHSNotifyRadioButtonForm = ({
   learnMoreLink = '',
   learnMoreText = '',
   backLink,
+  isLetterAuthoringEnabled = false,
 }: NHSNotifyRadioButtonFormProps) => (
   <NHSNotifyFormWrapper
     action={action}
@@ -93,6 +98,28 @@ export const NHSNotifyRadioButtonForm = ({
         ))}
       </Radios>
     </Fieldset>
+    {isLetterAuthoringEnabled ? null : (
+      <div className='nhsuk-card nhsuk-card--warning nhsuk-u-reading-width'>
+        <div className='nhsuk-card__content'>
+          <h4 className='nhsuk-card__heading'>
+            {warningCalloutContent.headingLabel}
+          </h4>
+          <p className='nhsuk-card__description nhsuk-u-margin-top-3 nhsuk-u-margin-bottom-6'>
+            {warningCalloutContent.firstParagraph}
+          </p>
+          <p className='nhsuk-card__description'>
+            {warningCalloutContent.secondParagraph}
+            <a
+              href={warningCalloutContent.link.href}
+              target='_blank'
+              rel='noopener noreferrer'
+            >
+              {warningCalloutContent.link.text}
+            </a>
+          </p>
+        </div>
+      </div>
+    )}
     <NHSNotifyButton
       type='submit'
       data-testid='submit-button'
diff --git a/frontend/src/components/organisms/PreviewDigitalTemplate/PreviewDigitalTemplate.tsx b/frontend/src/components/organisms/PreviewDigitalTemplate/PreviewDigitalTemplate.tsx
index 659fe344b..69a431923 100644
--- a/frontend/src/components/organisms/PreviewDigitalTemplate/PreviewDigitalTemplate.tsx
+++ b/frontend/src/components/organisms/PreviewDigitalTemplate/PreviewDigitalTemplate.tsx
@@ -39,6 +39,7 @@ export function PreviewDigitalTemplate(props: PreviewTemplateProps) {
               isPgeHeading: false,
               size: 'm',
             }}
+            isLetterAuthoringEnabled={features.letterAuthoring}
           />
         </>
       )}
diff --git a/frontend/src/content/content.ts b/frontend/src/content/content.ts
index 9208ffafb..d4360204b 100644
--- a/frontend/src/content/content.ts
+++ b/frontend/src/content/content.ts
@@ -802,6 +802,15 @@ const chooseTemplateType = {
     x1: 'Large print letter',
     language: 'Other language letter',
   },
+  warningCalloutContent: {
+    headingLabel: 'To create a letter template',
+    firstParagraph: 'You cannot upload a letter template using this service.',
+    secondParagraph: 'Follow our guidance to ',
+    link: {
+      text: 'upload a letter template (opens in a new tab)',
+      href: 'https://notify.nhs.uk/using-nhs-notify/upload-a-letter',
+    },
+  },
 };
 
 const nameYourTemplate = {